Hansen, Wenke; Tanja Dräger and Ruta Landgrebe 2004: Capacity Building on the Community's Environmental Policy. EU Legislation on river basin management and the reduction of nutrient pollution. Ecologic - Institute for International and European Environmental Policy, Berlin.

Hansen, Wenke; Maria Christopher and Maic Verbuecheln 2004: Es Atlieku Tvarkymo Politika ir Regionines ir Vientines Valdzios Institutuciju Uzdaviniai. Ecologic Institut, Aplinkosaugos valdymo ir technologiju centras (ECAT-Lietuva), Kaunas.

Hansen, Wenke and Peter Beyer 2003: Incineration as recovery and disposal of waste: Analysis and interpretation of the judgements of the European Court of Justice C-458/00 and C-228/00. IEEP/Ecologic.